/Engine/Source/Runtime/Experimental/FieldSystem/Source/FieldSystemEngine/Public/Field/FieldSystemObjects.h
This function first defines a radial integer field equal to Interior-value inside a sphere / Exterior-value outside. This field will be used alongside the particle input value and the mask condition to compute the particle output value.
[URadialIntMask](API\Runtime\FieldSystemEngine\Field\URadialIntMask) * SetRadialIntMask ( float Radius, FVector Position, int32 InteriorValue, int32 ExteriorValue, ESetMaskConditionType SetMaskConditionIn )